Investigating Variables Affecting Photosynthetic Rates in Plants

1. RiceX:ADV BIO.1.xAP - Lab 3 Student: CW
Investigating Variables Affecting Photosynthetic Rates in Plants
1. Variable: sodium bicarbonate concentration
2. Type of leaf: fresh organic spinach leaves
3. Total Time: 5 minutes, checked every 1 minute
4. 8ml of 10 leaf disks in a .2% sodium bicarbonate solution
5. Conclusion:
Results were inconclusive. The only
group that leaf disks sank to the
bottom was in the control group.
Sodium bicarbonate concentration
Control Group: solution with a drop of soap = 6/10 float
Group 1: 15g in 400ml = no change 10/10 float
Group 2: 25g in 400ml = no change 10/10 float
Group 3: 35g in 400ml = no change 10/10 float
Light intensity
Control Group: solution with a drop of soap = 6/10 float
Group 1: light on vs off: = no change 10/10 float
Group 2: light on vs off: = no change 10/10 float
Group 3: light on vs off: = no change 10/10 float